IBM 4230 User Guide - Page 295
Appendix E. Cabling Information
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| Appendix E. Cabling Information | Serial Attachment (Models 4S3 and 5S3) | The 4230 attaches to a host or controller by one of two serial | interfaces, RS-232C or RS-422A. A single 25-pin D connector | mounted directly on the adapter card allows attachment to either | interface. | The RS-232C interface uses a standard serial cable up to 15.2 m (50 | ft) in length with transmission rates up to 19.2 Kbps. | The RS-422A interface uses a serial cable up to 1219 m (4,000 ft) in | length with transmission rates up to 38.4 Kbps. | RS-232C Connector Pin Assignments | Pin | Number Signal Name Description |2 TXD Transmit Data |3 RXD Receive Data |4 RTS Request to Send |5 CTS Clear to Send |6 DSR Data Set Ready |7 SG Signal Ground | 20 DTR Data Terminal Ready | RS-422A Connector Pin Assignments | Pin | Number Signal Name Description | 15 - RXD Receive Data | 17 + RXD Receive Data | 19 - TXD Transmit Data | 25 + TXD Transmit Data © Copyright IBM Corp. 1991, 1994 E-1